A group embarks from the Orinda BART Station on a "wandering," long walkabouts organized by the Wanderers Union.

A group embarks from the Orinda BART Station on a "wandering," long...

"You walked all that way?" asked the man standing on Hunters Point Boulevard. The young woman next to him pointed at a map, tracing the route she and her fellow walkers had taken through a swath of southeastern San Francisco, past pet salons and wheel-alignment places, warehouses and while-you-wait dry cleaners, the EcoCenter at Heron's Head Park and the Archimedes Banya bathhouse, along India Basin and an open view of the bay, where an orange tanker floated in the blue-gray water. The San Francisco Wholesale Produce Market at Jerrold Avenue and Toland Street was next.

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